Composition for the treatment of cast-iron



UNITED STATES PATENT OFF-ICE.

11mm; bonus, or nmmron, OHIO, ASSIGNOR 'ro NILES-ZBEMENT-POND comramr,

YORK, N. Y., A CORPORATION OF NEW JERSEY.

COKPOSIT'ION FOR THE TREATMENT OF CAST-IRON.

1,397,404. Re Drawing.

This invention relates to the production of castiron and in particular to a composition which the following to bev added to the iron after it has been drawn from the cupola to 'avoid the effects of sulfur and other ingredients which may cause red-shortness, blowholes and brittleness. It is an object of the invention to provide a composition which may be added to cast iron in the form .of apowder after or while the iron is being drawn from the cupola and which will combine with the sulfur present in the iron and overcome its deleterious effects. 1 i

A further object of the invention is to provide a composition which may be used conveniently and without complicating the recess of smelting, molding or casting.

With. the above and other objects in view my invention consists in the features of the composition set forth in the following \specification.

It is to-..be understood that the present showing discloses but one 'fio composition made in accordance w th the present invention and that other compositions comprising substantially the same in edients or the equivalents thereof are. inclu ed within the spirit and scope of the invention as ex ressed in the appended claims.

he invention consists preferably in a com sition including an a loy of titanium, ana loy of manganese and .a third compound or alloy which is included in the composition to aid in softening the iron. In the development of the invention I have used eight parts of ferro-titanium, four arts of ferroman anese and one part 0 ferro-silicon,

but it is to be understood that the roportions of these compounds or alloys orming the composition may be considerably varied without departing from the spirit of this invention. Furthermore, it is to be understood that other compositions of substances containing titanium, manganese, and silicon may be used instead of the ferro alloys of Specification of Letters Patent.

Applicationflled July 10,

osition for the Treat-- Patented Nov. 15, 1921 1920. Serial No. 395,187.

these elements and especially that the proportion of silicon, the function of which is to neutralize the hardening effect of the titanium present, may be varied or other elementssubstituted having a similar softening effect.

The alloys above mentioned or their alents are preferably mixed together in the proportions substantially as above indicated and the mixture then ground into powdered form. It may, however, in some instances, be advisable to melt the mixture and, after allowing the mixture to cool, then crush it into a finely divided or powdered form.

In this powdered form the mixture is added to the ladle and, as the iron is poured. into the ladle the mixture becomes intimately mixed with the iron.

The sulfur present in the iron combines with the titanius forming titanius sulfid which forms throughout the molten mass, the manganese also combines with the sulfur equivpresent forming manganese sulfid. As is well knownthe sulfur when combined with. manganese is less detrimental to the quality of the iron than when it is combined directly with iron. There is a tendency, however, for the manganese sulfid to segregate from the iron in the form of large drops and, as these have little strength in themselves, they greatly weaken the iron.

The action of the elements titanium and manganese when combined in the proportions aboutas above specified has the effect of combining with all the sulfur present and causing the sulfur to permeate the entire mass of iron in minute drops rather than to segregate in -large drops of manganese sulfid which cause the iron to have an inferior quality.

The sulfur is not removed from the iron in the'form of slag, although, of course, some sulfur resent may be removed in that man ner. ractically the whole amount of sulfur is retained in the mass of iron and so overcome this hardening effect or tendency of the titanium that a softening agent such as a compound of sllicon, 1n the resent instance ferro-sihcon 1s added.

ny other known before the com position is used, and

the composition .modified, if necessary in accordance with the requirements'of the particular iron being treated.

Furthermore, the proportions of the alloys forming my new composition may be varied for different characters of iron in which the impurities present are indifferent proportions. For instance, should the iron have manganese in its composition, the proportion of the manganese in the composition may be reduced accordingly. And in other characters of iron having a large amount of sulfur, an increased amount of both titanium and manganese may be required to neutralize its effects. An iron being treated which is soft may need but little silicon in the composition.

I have found in using a composition having the proportions above indicated that the amount of titanium in thefinal result should be about 0.2% and the manganese, and titanium combined should, in the final result be at least 0.7%, and can be as high as 0.8%. With' phosphorus in the iron between 0.7 and 0.8% the-titanium should not be present in the final result above 0.2%, but with smaller amounts of phosphorus the percentage of titanium might be slightly increased.

What I claim is:

I LA composition for the treatment. of iron, comprising a mixture of an alloy of titanium, an alloy of manganese and a softening agent.

1. A composition for the treatment of iron, comprising a mixture of ferro-titanium, ferro-manganese, and a softening agent.

3. A composition for the treatment of iron, comprising a mixture of ferro-titanium,

ferro-manganese, and an alloy of silicon.

.4. A composition for the treatment of iron, comprising. a mixture of ferro-titanium, ferro-manganese, and ferro-silicon.

.5. A composition for the treatment of iron, comprising a mixture of ferro-titanium,

ferro-manganese, and a quantity of a softening agent sufficient to neutralize the hardening effect of the'ferro-titanium.

7. A' composition for the treatment of iron, comprising a mixture of a substance containing titanium, a substance containing.

manganese, and a quantity of a softening agent sufficient to neutralize the hardening effect of the titanium.

S. A composition for the treatment of iron, comprising a mixture of ferro-titanium, and a relatively small.

ferro-manganese, quantity of an alloy of silicon.

9. A composition for the treatment of iron. comprising a mixture of ferro-titanium,

ferro-manganese, and a quantity of an alloy of silicon sufficient to neutralize the hardening effect of the ferro-titanium.

10. A-composition for the treatment of iron, comprising a mixture of ferro-titanium, ferro-manganese, and a relatively small quantity of ferro-silicon.

11. A composition for the treatment of iron, comprising a mixture of ferro-titanium, ferro-manganese, and a quantity of ferrosilicon sufficient to neutralize the hardening effect of the ferro-titanium.

12. A composition for the treatment of iron, comprising a mixture of eight parts of an alloy of titanium, four parts of a compound of manganese, and one part of a softening agent.

13. Acomposition for the treatment of iron, comprising a mixture of eight parts of ferro-titanium, four parts of ferro-man- HENRY L. COLES. 

